Tomb, Dimension, Water:
1 check / 200' of hallway or tunnel: Roll 1-D20 -- Roll needed for encounter: 12+
1 check / chamber or room: Roll 1-D20 -- Roll needed for encounter: 7+
%Roll: Encounter types:
01-05: Character G.M.: Pre-make all NPC character encounters.
06-20: Dead
21-22: Race
23-24: Jahtha
25-26: Jahthein
27-00: Undead